0. Debian menu system- Generate menus files for applications from a list of menu entries files and
an application specific menu-method file. This is the way coherence between
installed packages and programs menu is achieved on Debian systems.

1. aptitude- package manager with a number of useful features, including a mutt-like package matching syntax, dselect-like persistence of user actions, the ability to view the Debian changelog of most packages, and a command-line mode similar to of apt-get.